Steam-engine.



J. N. LEAGH. STEAM ENGINE APPLICATION-FILED SEPT. 6. 1907.

4 SHEETS-SHEET 1.

witnesses Inunzarl Q1 PATENTED APR. 7, 190a.

PATENTED APR. 7, 1908.

J. N. LEAGH. STEAM ENGINE. APPLICATION If-ILED SEPT. e. 1907'.

4 SHEETS-SHEET 2.

Inverztar witnesses} onms P rs 5 co, WASHINGTON, o. c.

No. 884,097. PATBNTEED APR. 7. 1908;

J. N. LEAGH. STEAM ENGINE.

APPLICATION FILED SEPT. 6. 1907. i

Y 4 SHBBTIS-SHEET a.

r Ti 0 i 00. 9/ E%r 'No. 884,097. PATENTED APR. 7, 190s.

J. LBAGH, STEAM ENGINE. APPLICATION FILED SEPT. 6, 1907- 4 SHEETS-SHEET4.

- Inventor.

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JOHN N. LEAGH, OF MELROSE, MASSACHUSETTS, ASSIGNOR TO JUDSON L. THOMSONMFG COMPANY, A CORPORATION OF MAINE.

STE AM-ENGINE Specification of Letters Patent.

Patented April 7, 1908.

Application filed September 6, 1907. Serial No. 391,547.

provide a simple, compact and accessible engine having the water, fueland oil pumps mounted thereon and being so arranged as to minimizefriction and weight.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theappended claims.

Referring to the drawings: Figure 1 is a plan of my improved steamengine. Fig. 2 is a side elevation of the same. Fig. 3 is an enlargedside elevation of the oil pump and its operating mechanism as viewedfrom the side of the engine opposite to that shown in Fig. 2. Fig. 4 isan enlarged detail sectional elevation of the water pump taken on line4-4 of Fig. 1, looking toward the left in said figure. Fig. 5 is anenlarged detail sectional elevation of the fuel pump taken on line 55 ofFig. 1, looking toward the left in said fig ure. Fig. 6 is an enlargeddetail sectional elevation of the oil pump taken on line 66 of Fig. 1.Fig. 7 is an enlarged sectional elevation taken on line 77 of Fig. 2.Figs. 8

and 9 are detail elevations of two washers used on bearing studs.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 10 is a cylinder casting comprising cylinders 11 and 11in which pistons 12 and 12 are arranged to reciprocate respectively. Twocrank-shaft bearings 13 and 13 are connected to the cylinder casting 10by rods 14 and 14, respectively, and rods 15 and 15, respectively, saidrods constituting a portion of the frame of the engine. A crank-shaft16, j ournaled in the bearings 13 and 13, is provided with crankpins 17and 17, said crank-pins being connected, respectively, to crossheads 18and 18 by connecting rods 19 and 19. The crosshead 18 is connected tothe piston 12 by a piston-rod 20, while the crosshead 18 is connected tothe piston 12 by a piston-rod 20. The crossheads 18 and 18 are provided,respectively, with grooves 21 and 21 which are preferably semi-circularin cross section,

there being two rolls 22 and 22 on which the crossheads 18 and 18 rest,respectively. The rolls 22 and 22 are mounted on studs 23 and 23,respectively, and said studs and appertaining parts being identical inconstruction a description ofthe stud 23 will sufiice for both.

The stud 23 is provided with a stem 24 which is eccentric to the mainportion of said stud and to the roll 22, said stud extending through aframe 25 mounted on the rods 14', V

14 and 15, 15. The stud 23, with its eccentric stem, constitutes aneccentric whereby the roll 22 may be adjusted toward and away from thecrosshead 18. A nut 26, having screw-threaded engagement with the stem24, bears against a washer 27, shown in detail in Fig. 9, said washerbeing provided with a tooth 28 which engages a groove 29 formed in thestem 24, said washer being preferably corrugated on its face which bearsagainst the frame 25, so that when the nut 26 is screwed up the stud 23is held against rotation.

The stud 23 is provided with a substantially conical ball race 30 and acollar 31 having a substantially conical ball race 32 has screw-threadedengagement with the stud 23, there being a series of balls 33 interposedbetween said ball races and the inner periphery of the roll 22, saidperiphery also constituting a ball race. A nut 34, having screw-threadedengagement with the stud 23, bears against a washer 35, identical inform with the washer 27. By rotating the collar 31 in the properdirection the ball race 32 is moved toward the ball race 30 tocompensate for wear and the collar 31 is locked against rotation by thenut 34 and toothed washer 35the corrugated face of which bears againstsaid collar.

The crossheads 18 and 18 are provided, respectively, with racks 36, 36which mesh, respectively, with gear segments 37 and 37, said gearsegments being formed on rocking members 38 and 38, respectively, saidrocking members being mounted, respectively, on studs 39 and 39. Thecrossheads 18 and 18 are provided, respectively, with grooves 40 and 40in which are located metal strips 41 and 41, respectively, the upperfaces of said strips being coincident with the pitch line of the racks36 and 36. The rocking members 38 and 38 are provided, respectively,with grooves 42 and 42, respectively, in which are located metal strips43 and 43, said strips having their lower faces formed on an arc of acircle with the axes of the studs 39 and 39 as centers, said faces beingcoincident with the pitch circles of their respective gear segments 37and 37. Thus it will be seen that the members 38 and 38, with the strips43 and 43, constitute rollers arranged in rolling contact with the metalstrips 41 and 41 which constitute a part of the crossheads 18 and 18.

The crossheads 18 and 18 are thus rigidly and accurately guided betweenthe rocking members 33 and 38 and the rolls 22 and 22 and are preventedfrom moving laterally by the grooves formed in the upper and lower sidesof said racks.

The studs 39 and 39 are provided with stems 44 and 44, respectively,said stems being formed eccentric'to the main portions of said studs andbeing held in the frame 25 in the same manner as the studs 23 and 23 areheld.

Ball bearings 45 and 45, similar to those of the studs 23 and 23, areprovided for the members 38 and 38 to rock on. The parts of saidbearings being similar in form to the parts of the bearings of the studs23 and 23 a detailed description of them will be unnecessary. Therocking members 38 and 38 are provided, respectively, with gear segments46 and 46 which mesh into racks 47 and 47 formed on rods 48 and 48,respectively, said rods being provided with grooves 49 and 49,respectively, said grooves being preferably semi-circular in crosssection. Two rolls 50 and 50 arranged to roll in the grooves 49 and 49,respectively, are mounted on studs 51 and 51, respectively, said studsbeing provided with stems 52 and 52 which are formed eccentric to themain portions of said studs, respectively, and are secured to the frame25 in the same manner in which the studs 23 and 23 are secured. Therolls 50 and 50 are mounted on ball bearings 53 and 53, respectively,said ball bearings being identical in form with the ball bearings of thestuds 23 and 23 and a detailed description of them will be unnecessary.The rolls 50 and 50 being located in the grooves 49 and 49,respectively, prevent the rods 48 and 48 from moving transversely.

Formed on the rod 48 are two pump plungers 54 and 55 which are arrangedto reciprocate within pump cylinders or casings 56 and 57, saidcylinders being mounted on brackets 58 and 59, respectively. Thebrackets 58 and 59 are mounted on the rods 15 and 15.

Referring to Fig. 4, it will be seen that within the pump casing 56 aretwo check valves 60 and 61 of the ball type, said valves being adaptedto control the flow of the fluid from an inlet passage 62 to an outletpassage 63 as the plunger 54 is reciprocated.

The pump, consisting of a plunger 54 and cylinder or casing 56, isadapted for use as a water pump which may be used to pump water to aboiler. The casing 57, shown in section in Fig. 5, is provided withcheck valves 64 and 65 of the ball type, said check valves being adaptedto control the flow of fluid from an inlet passage 66 to an outletpassage 67 as the plunger 55 is reciprocated. The pump consisting of theplunger 55 and casing 57 is adapted for use as a fuel pump that is, fora hydrocarbon such as gasolene or kerosene.

The rod 48 has formed thereon a pump plunger 68 arranged to reciprocatein a pump cylinder or casing 69 fast to the bracket 58 having valvesidentical with those of the pump casing 56. The pump plunger 68 and thecasing 69 constitute a pump adapted for use as a water pump inconnection with the other water pump hereinbefore described. 1

A pump cylinder or casing 70 is fast to a bracket 71 and said bracket,in turn, is fast to the bracket 59. (Fig. 3). A plunger 72, arranged toreciprocate in the cylinder 70, is provided with a stem 73 arranged toslide in a bearing 74, said plunger being also provided with a slot 75extending transversely thereof. A'crank 76 fast to a crank-shaft 77journaled in the bracket 71 is provided with a crankpin 78 located inthe slot 75. A ratchet 79 fast to the shaft 77 is engaged by a pawl 80pivotally mounted on a pawl-carrier 81, said pawl-carrier being arrangedto oscillate on the shaft 77. A stop-pawl 82, held in engagement withthe ratchet 79 by means of a spring 83, prevents said ratchet fromrotating clockwise (Fig. 3). The pawl-carrier 81 is pivotally connectedto a link 84, said link being also connected to a stud 85 located in aslot 86 formed in an arm 87 fast to the rocking member 38. The stud 85is provided with a flatted portion 88 which engages the sides of theslot 86 so that said stud is prevented from rotating in said slot. A nut89 having screw-threaded engagement with the stud 85 bears against asleeve 90 surrounding said stud and so arranged that said nut is adaptedto clamp said stud rigidly with rela tion to the arm 87 without bindingthe link 84. .The stud 85 may be adjusted toward and away from the axisof the member 38 to vary the throw of the pawl-carrier 81 and theconsequent movement of the pump plunger 72.

Within the pump casing 70 are two check valves 91 and 92 which areadapted to control the movement of fluid from an inlet passage 93 to anoutlet passage 94, said valves being of the ball type. The pump justdescribed is adapted for use as a lubrieating oil pump and may beconnected by a pipe 95 to the steam chest of the cylinder casting 10.

The operation of the oil pump just described is as follows: As thecrosshead 18' imparts a rocking movement to 'the member 38 said rockingmovement is communicated by the link 84 to the pawl-carrier 81 and thepawl 80, therefore, imparts an intermittent rotary movement to theratchet 79 and crank 76. The crank-pin 78, therefore, imparts to theplunger 72 an intermittent reciprocatory movement and oil is drawn inthrough the inlet passage 93 and forced out through the outlet passage94.

It will be seen that by reason of the arrangement of the eccentric studs51 and 51 and the eccentric studs 44' and 44 the rolls 50 and 50 may beadjusted toward and away from the rods 48 and 48, respectively. Therocking members 38 and 38 may be adjusted toward and away from thecrossheads 18 and 18, thereby insuring a perfect rolling contact withoutany looseness.

The engine hereinbefore described may be provided with any suitable typeof valve gear.

Having thus described my invention, what I claim and desire by LettersPatent to secure is:

1. In an engine, a steam cylinder, a piston arranged to reciprocatewithin said cylinder, a crosshead, a piston rod connecting saidcrosshead to said piston, a crank, a connecting rod connecting saidcrosshead to said crank, a rack on said crosshead, a rocking member, agear segment on said member meshing into said rack, two pump cylinders,a rod comprising two plungers located in said pump cylinders,respectively, a rack on said rod, and a gear segment on said rockingmember meshing into said last named rack.

2. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead, a piston rod connecting said piston to saidcrosshead, a frame, a roll arranged in rolling contact with saidcrosshead, and a stud on which said roll is mounted, said studconstituting an eccentric rotatably mounted on said frame, whereby saidroll may be adjusted toward and away from said crosshead.

3. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead, a piston rod connecting said piston to saidcrosshead, a frame, a roll arranged in rolling contact with saidcrosshead, a stud on which said roll is mounted, said stud constitutingan eccentric rotatably mounted on said frame, whereby said roll may beadjusted toward and away from said crosshead, and a series of ballsinterposed between said stud and said roll.

4. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead, a piston rod connecting said piston to saidcrosshead, a frame, a roll arranged in rolling contact with saidcrosshead, a stud on which said roll is mounted, said stud having a stemeccentric with said roll, said stem being rotatably mounted on saidframe, whereby said roll may be adjusted toward and away from saidcrosshead, and a nut having screw-threaded engagement with said stem,whereby said stud may be held against rotation.

5. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead, a piston rod connecting said piston to saidcrosshead, a frame, a roll arranged in rolling contact with saidcrosshead, a stud mounted on said frame, said stud being provided with aball race, a collar having screw-threaded engagement with said stud,said collar having a ball race, a series of balls arranged in rollingcontact with said races and with the interior periphery of said roll,and means to lock said collar against rotation on said stud.

6. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead provided with a concave groove extendinglongitudinally thereof, a piston rod connecting said piston to saidcrosshead, a roll having a convex periphery located in said groove, anda stud on which said roll is mounted.

7. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead provided with a groove extendinglongitudinally thereof, a piston rod connecting said piston to saidcrosshead, a roll located in said groove, and a stud on which said rollis mounted.

8. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead provided with two grooves located in oppositefaces thereof, respectively, and extending longitudinally thereof, apiston rod connecting said piston to said crosshead, and two rockingmembers arranged with their peripheries in rolling contact with saidfaces, respectively.

9. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead provided with two grooves located in oppositefaces thereof, respectively, and extending longitudinally thereof, apiston rod connecting said piston to said crosshead, two rockin membersarranged with their peripheries in rolling contact with said faces,respectively, and two ball bearings on which said rocking members aremounted, respectively. I

10. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead, a piston rod connecting said piston to saidcrosshead, a frame, two rocking members arranged with their peripheriesin rolling contact with opposite sides, respectively, of said crosshead,and two studs on which said rocking members are pivoted, respectively,said studs constituting eccentrics rotatably mounted on said frame,whereby said members may be adjusted toward and away from each other.

11. In an engine, a cylinder, a piston arranged to reciprocate withinsaid cylinder, a crosshead provided with two grooves in opposite facesthereof and extending longitudinally thereof, a piston rod connectingsaid piston to said crosshead, a frame, two rocking members arrangedwith their peripheries in rolling contact with said faces, respectively,and two studs on which said rocking members are pivoted, respectively,said studs constituting eccentrics rotatably mounted on said frame,whereby said members may be adjusted toward and away from each other.

12. In an engine, a steam cylinder, a piston arranged to reciprocatewithin said cylinder, a crosshead, a piston rod connecting saidcrosshead to said piston, a rack on said crosshead, a rocking member, agear segment on said member meshing into said rack, a pump cylinder, aplunger located in said pump cylinder, a rack on one side of saidplunger, a gear segment on said member meshing into said second namedrack, and a roll arranged with its periphery in rolling contact with theother side of said plunger.

13. In an engine, a steam cylinder, a piston arranged to reciprocatewithin said cylinder, a crosshead, a piston rod connecting saidcrosshead to said piston, a rack on said crosshead, a rocking member, agear segment on said member meshing into said rack, a pump cylinder, aplunger located in said pump cylinder, a rack on one side of saidplunger, a gear segment on said member meshing into said second namedrack, a roll arranged with its peri hery in rolling contact With theother sire of said plunger, a

frame, and a stud on which said roll is mounted, said stud constitutingan eccentric mounted on said frame, whereby said roll may be adjustedtoward and away from said second named rack.

14. In an engine, a steam cylinder, a piston arranged to reciprocatewithin said cylinder, a crosshead, a piston rod connecting saidcrosshead to said piston, a rack on said crosshead, a rocking member, agear segment on said member meshing into said rack, a pump cylinder, aplunger located in said pump cylinder, said plunger provided with alongitudinal groove in one side thereof, a rack on the other side ofsaid plunger, a gear segment on said member meshing into said secondnamed rack,.a roll located in said groove and arranged in rollingcontact with said plunger, and a frame on which said roll is supported.

15. In an engine, a steam cylinder, a piston arranged to reciprocatewithin said cylinder, a crosshead, a piston rod connecting saidcrosshead to said piston, a rack on said crosshead, a rocking member, agear segment on said member meshing into said rack, a pump cylinder, aplunger located in said pump cylinder, said plunger provided with alongitudinal groove in one side thereof, a rack on the other side ofsaid plunger, a gear segment on said member meshing into said secondnamed rack, a roll located in said groove and arranged in rollingcontact with said plunger, a frame on which said roll is supported, anda ball bearing on which said roll is mounted.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

JOHN N. LEACH.

l/Vitnesses CHARLES S. GooDING, SADIE V. MCCARTHY.

